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July 2025
777518-420
777518-420, 2.5 W, 160 g, 250 Vrms, FP-RLY-420 Relay Module for FieldPoint
Actual item may vary if no part number is provided on quote request.
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Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments 777518-420 Relay Module for FieldPoint
National Instruments part number 777518-420 is an identifying part number for the FP-RLY-420, a Relay Module for FieldPoint 8 SPST, non-latching normally open relays with 2.5 W Power Requirement. Each of the two relay channels on this module has two terminals: NO and IC. All Vsup and COM terminals are internally connected. For protection, a fast-acting 3 A, 250 V fuse can be installed at the IC terminal.
This Relay Module includes eight electromechanical SPST relays. The blade's power-on state is set to "off for safe installation." When turned on, the IC and NO contacts form a short circuit with about 150 mΩ resistance between them. The NI 777518-420 has integrated protection MOVs to prevent high voltage application across the contacts and provides 250 Vrms continuous isolation between the inter-module communication bus and the backplane. This Relay Module includes high-quality relays capable of switching up to 20 times per second and handling 1 operation per second at maximum load.
It operates with an 8 ms operate time, a 4 ms release time, and a 4 ms bound time. It offers built-in isolation between modules, safeguarding your FieldPoint system, controller, or communication interface from high voltage levels. Each channel on the RLY-420 uses electrically isolated output relays, ensuring that each relay output has its own ground plane. This design allows each channel to operate with different voltage potentials; for example, you can connect one channel to a 24 VDC signal and another channel on the same module to 250 VAC. Due to their higher power consumption, FP-RLY-42x modules may restrict the number of I/O modules you can connect to a single network interface module. Controllers and network interface modules provide up to 9 watts of power for I/O modules, while the FP-RLY-420 module itself requires up to 2.5 watts.
| Model | 777518-420 |
|---|---|
| Model Range | FP-RLY-420 |
| Part Type | Relay Module for FieldPoint |
| Number of Relays | 8 |
| Relay Type | SPST, nonlatching, normally open |
| Power Requirement | 2.5 W |
| Transient Voltage | 2,300 Vrms |
| Maximum Isolation Voltage | 250 Vrms |
| Expected Mechanical Life | 2 × 107 operations minimum |
| Weight | 160 g |
Associated part numbers for 777518-420:
777518-420 PDF Manuals
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